CVE-2021-33560 : Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption beca

Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

Published 2021-06-08 11:15:08

Updated 2022-12-07 01:20:43

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-33560

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Network Function Cloud Native Environment » Version: 1.9.0
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.9.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Network Function Cloud Native Environment » Version: 1.10.0
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Network Slice Selection Function » Version: 1.8.0
cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Network Repository Function » Version: 1.14.0
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.14.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Network Repository Function » Version: 1.15.0
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Network Repository Function » Version: 1.15.1
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Binding Support Function » Version: 1.11.0
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*
Matching versions
Oracle » Communications Cloud Native Core Service Communication Proxy » Version: 1.15.0
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:*
Matching versions
Gnupg » Libgcrypt
Versions from including (>=) 1.9.0 and before (<) 1.9.3
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*
Matching versions
Gnupg » Libgcrypt
Versions before (<) 1.8.8
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 33
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 34
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-33560

EPSS FAQ

1.49%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 80 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-33560

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2021-33560

CWE-203 Observable Discrepancy

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-33560

https://www.oracle.com/security-alerts/cpuapr2022.html

Oracle Critical Patch Update Advisory - April 2022
Patch;Third Party Advisory

CVEs referencing this url
https://dev.gnupg.org/T5328

⚓ T5328 On the (in)security of Elgamal in OpenPGP
Vendor Advisory
https://www.oracle.com/security-alerts/cpujan2022.html

Oracle Critical Patch Update Advisory - January 2022
Patch;Third Party Advisory

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/

[SECURITY] Fedora 34 Update: libgcrypt-1.9.3-3.fc34 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory
https://dev.gnupg.org/T5466

⚓ T5466 Release Libgcrypt 1.8.8
Release Notes;Vendor Advisory
https://dev.gnupg.org/T5305

⚓ T5305 Release Libgcrypt 1.9.3
Release Notes;Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/

[SECURITY] Fedora 33 Update: libgcrypt-1.8.8-1.fc33 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory
https://security.gentoo.org/glsa/202210-13

libgcrypt: Multiple Vulnerabilities (GLSA 202210-13) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61

rCe8b7f10be275
Patch;Vendor Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html

Oracle Critical Patch Update Advisory - October 2021
Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2021/06/msg00021.html

[SECURITY] [DLA 2691-1] libgcrypt20 security update
Mailing List;Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html

Oracle Critical Patch Update Advisory - July 2022
Patch;Third Party Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2021-33560

Products affected by CVE-2021-33560

Exploit prediction scoring system (EPSS) score for CVE-2021-33560

CVSS scores for CVE-2021-33560

CWE ids for CVE-2021-33560

References for CVE-2021-33560